There are 837 murders detailed here, with date, age of the victim and the London borough in which they died. The UK has around 600 murders a year, and the capital annually accounts for 100 to 150 of those.

The data itself is messy - it comes as a PDF, which is watermarked and locked, to make copying as difficult as possible. But, thanks to John Houston, we can help you access it (and to the awesome @foimonkey for bringing it to our attention).

It shows what many crime experts fear: murders victims in London tend to be young: 433 were under 30 with nearly 200 of those under the age of 21.

The worst two boroughs for murders are also two of London's poorest: Lambeth and Newham.

London murder map interactive. Click image to explore it

Most of these cases end up with someone in court and a conviction. For a minority - 124 - there is still no resolution. That might sound like a lot but sanction detection rates (an investigation resulting in a conviction or some other penalty) are nationally at 83% for murder, so the Met is just above that.